You said yourself that it was the patrons who treated the gentleman who warned you to leave with disregard. If you had paid attention to him, you could have gone directly to get a refund before leaving (it sounds like you prepaid for this meal).

I suppose you would prefer being blown up in lieu of being inconvenienced. Let me tell you, gas explosion risk is nothing to fool with. Extremely dangerous.

Did you take a voucher? It sounds like you are a regular customer. You can use the voucher next time. I really don't think they treated you with disregard; this is an unusual event, and they did look out for your safety and offer a voucher.